Lethe sicelis
In 3 days ~20% in a week ~50%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Japanese Treebrown sighting in Tokyo on a given day, based on 242 verified sightings from GBIF citizen-science data. It is the 75th most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
June and September
In those months about 20% of wildlife watchers report a Japanese Treebrown in Tokyo on a given day, against under 5% in November to April, the lowest months. Those are among Tokyo's wettest months, with about 200 mm of rain a month against 75 mm in February.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Japanese Treebrown sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 2 cities where we can rate Japanese Treebrown sightings, Tokyo has the highest daily chance: about 10%. Next come Osaka (Japan, about 10%).
GBIF citizen-science records
It is estimated from how often the Japanese Treebrown is recorded against all the insects logged in Tokyo (242 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
